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authorKlement Sekera <ksekera@cisco.com>2017-11-03 10:25:23 +0100
committerFlorin Coras <florin.coras@gmail.com>2017-11-07 16:35:06 +0000
commit3c37ad58308ce69bc0ec3d1cead5fb138a2959b1 (patch)
tree278605d67db181135f857d36193d3bcb58ab2d5f /src/vnet
parent2eeeb4b1706150f69402dd8afc43856f801cd89a (diff)
add tracing to udp punt code
Change-Id: I5f92e40d2fe08a05f51622143648433732141cf4 Signed-off-by: Klement Sekera <ksekera@cisco.com>
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/ip/punt.c63
1 files changed, 58 insertions, 5 deletions
diff --git a/src/vnet/ip/punt.c b/src/vnet/ip/punt.c
index 651542fa2c8..7b868099039 100644
--- a/src/vnet/ip/punt.c
+++ b/src/vnet/ip/punt.c
@@ -232,18 +232,28 @@ VLIB_NODE_FUNCTION_MULTIARCH (udp6_punt_node, udp6_punt);;
/* *INDENT-ON* */
-static struct sockaddr_un *
-punt_socket_get (bool is_ip4, u16 port)
+static punt_client_t *
+punt_client_get (bool is_ip4, u16 port)
{
punt_main_t *pm = &punt_main;
- punt_client_t *v = is_ip4 ? pm->clients_by_dst_port4 :
- pm->clients_by_dst_port6;
+ punt_client_t *v =
+ is_ip4 ? pm->clients_by_dst_port4 : pm->clients_by_dst_port6;
u16 i = sparse_vec_index (v, port);
if (i == SPARSE_VEC_INVALID_INDEX)
return 0;
- return &vec_elt (v, i).caddr;
+ return &vec_elt (v, i);
+}
+
+static struct sockaddr_un *
+punt_socket_get (bool is_ip4, u16 port)
+{
+ punt_client_t *v = punt_client_get (is_ip4, port);
+ if (v)
+ return &v->caddr;
+
+ return NULL;
}
static void
@@ -270,6 +280,28 @@ punt_socket_unregister (bool is_ip4, u8 protocol, u16 port)
return;
}
+typedef struct
+{
+ punt_client_t client;
+ u8 is_midchain;
+} udp_punt_trace_t;
+
+u8 *
+format_udp_punt_trace (u8 * s, va_list * args)
+{
+ CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
+ CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
+ udp_punt_trace_t *t = va_arg (*args, udp_punt_trace_t *);
+ u32 indent = format_get_indent (s);
+ s = format (s, "to: %s", t->client.caddr.sun_path);
+ if (t->is_midchain)
+ {
+ s = format (s, "\n%U(buffer is part of chain)", format_white_space,
+ indent);
+ }
+ return s;
+}
+
always_inline uword
udp46_punt_socket_inline (vlib_main_t * vm,
vlib_node_runtime_t * node,
@@ -325,6 +357,18 @@ udp46_punt_socket_inline (vlib_main_t * vm,
goto error;
}
+ punt_client_t *c = NULL;
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ if (!c)
+ {
+ c = punt_client_get (is_ip4, port);
+ }
+ udp_punt_trace_t *t;
+ t = vlib_add_trace (vm, node, b, sizeof (t[0]));
+ clib_memcpy (&t->client, c, sizeof (t->client));
+ }
+
/* Re-set iovecs if present. */
if (iovecs)
_vec_len (iovecs) = 0;
@@ -347,6 +391,13 @@ udp46_punt_socket_inline (vlib_main_t * vm,
do
{
b = vlib_get_buffer (vm, b->next_buffer);
+ if (PREDICT_FALSE (b->flags & VLIB_BUFFER_IS_TRACED))
+ {
+ udp_punt_trace_t *t;
+ t = vlib_add_trace (vm, node, b, sizeof (t[0]));
+ clib_memcpy (&t->client, c, sizeof (t->client));
+ t->is_midchain = 1;
+ }
vec_add2 (iovecs, iov, 1);
@@ -394,6 +445,7 @@ udp6_punt_socket (vlib_main_t * vm,
VLIB_REGISTER_NODE (udp4_punt_socket_node) = {
.function = udp4_punt_socket,
.name = "ip4-udp-punt-socket",
+ .format_trace = format_udp_punt_trace,
.flags = VLIB_NODE_FLAG_IS_DROP,
/* Takes a vector of packets. */
.vector_size = sizeof (u32),
@@ -403,6 +455,7 @@ VLIB_REGISTER_NODE (udp4_punt_socket_node) = {
VLIB_REGISTER_NODE (udp6_punt_socket_node) = {
.function = udp6_punt_socket,
.name = "ip6-udp-punt-socket",
+ .format_trace = format_udp_punt_trace,
.flags = VLIB_NODE_FLAG_IS_DROP,
.vector_size = sizeof (u32),
.n_errors = PUNT_N_ERROR,